1 /*
2 * Copyright (C) 2010 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include "config.h"
27 #include "core/dom/DatasetDOMStringMap.h"
28
29 #include "bindings/v8/ExceptionMessages.h"
30 #include "bindings/v8/ExceptionState.h"
31 #include "core/dom/Attribute.h"
32 #include "core/dom/Element.h"
33 #include "core/dom/ExceptionCode.h"
34 #include "wtf/ASCIICType.h"
35 #include "wtf/text/StringBuilder.h"
36
37 namespace WebCore {
38
isValidAttributeName(const String & name)39 static bool isValidAttributeName(const String& name)
40 {
41 if (!name.startsWith("data-"))
42 return false;
43
44 unsigned length = name.length();
45 for (unsigned i = 5; i < length; ++i) {
46 if (isASCIIUpper(name[i]))
47 return false;
48 }
49
50 return true;
51 }
52
convertAttributeNameToPropertyName(const String & name)53 static String convertAttributeNameToPropertyName(const String& name)
54 {
55 StringBuilder stringBuilder;
56
57 unsigned length = name.length();
58 for (unsigned i = 5; i < length; ++i) {
59 UChar character = name[i];
60 if (character != '-')
61 stringBuilder.append(character);
62 else {
63 if ((i + 1 < length) && isASCIILower(name[i + 1])) {
64 stringBuilder.append(toASCIIUpper(name[i + 1]));
65 ++i;
66 } else
67 stringBuilder.append(character);
68 }
69 }
70
71 return stringBuilder.toString();
72 }
73
propertyNameMatchesAttributeName(const String & propertyName,const String & attributeName)74 static bool propertyNameMatchesAttributeName(const String& propertyName, const String& attributeName)
75 {
76 if (!attributeName.startsWith("data-"))
77 return false;
78
79 unsigned propertyLength = propertyName.length();
80 unsigned attributeLength = attributeName.length();
81
82 unsigned a = 5;
83 unsigned p = 0;
84 bool wordBoundary = false;
85 while (a < attributeLength && p < propertyLength) {
86 if (attributeName[a] == '-' && a + 1 < attributeLength && isASCIILower(attributeName[a + 1]))
87 wordBoundary = true;
88 else {
89 if ((wordBoundary ? toASCIIUpper(attributeName[a]) : attributeName[a]) != propertyName[p])
90 return false;
91 p++;
92 wordBoundary = false;
93 }
94 a++;
95 }
96
97 return (a == attributeLength && p == propertyLength);
98 }
99
isValidPropertyName(const String & name)100 static bool isValidPropertyName(const String& name)
101 {
102 unsigned length = name.length();
103 for (unsigned i = 0; i < length; ++i) {
104 if (name[i] == '-' && (i + 1 < length) && isASCIILower(name[i + 1]))
105 return false;
106 }
107 return true;
108 }
109
convertPropertyNameToAttributeName(const String & name)110 static String convertPropertyNameToAttributeName(const String& name)
111 {
112 StringBuilder builder;
113 builder.append("data-");
114
115 unsigned length = name.length();
116 for (unsigned i = 0; i < length; ++i) {
117 UChar character = name[i];
118 if (isASCIIUpper(character)) {
119 builder.append('-');
120 builder.append(toASCIILower(character));
121 } else
122 builder.append(character);
123 }
124
125 return builder.toString();
126 }
127
ref()128 void DatasetDOMStringMap::ref()
129 {
130 m_element->ref();
131 }
132
deref()133 void DatasetDOMStringMap::deref()
134 {
135 m_element->deref();
136 }
137
getNames(Vector<String> & names)138 void DatasetDOMStringMap::getNames(Vector<String>& names)
139 {
140 if (!m_element->hasAttributes())
141 return;
142
143 unsigned length = m_element->attributeCount();
144 for (unsigned i = 0; i < length; i++) {
145 const Attribute* attribute = m_element->attributeItem(i);
146 if (isValidAttributeName(attribute->localName()))
147 names.append(convertAttributeNameToPropertyName(attribute->localName()));
148 }
149 }
150
item(const String & name)151 String DatasetDOMStringMap::item(const String& name)
152 {
153 if (!m_element->hasAttributes())
154 return String();
155
156 unsigned length = m_element->attributeCount();
157 for (unsigned i = 0; i < length; i++) {
158 const Attribute* attribute = m_element->attributeItem(i);
159 if (propertyNameMatchesAttributeName(name, attribute->localName()))
160 return attribute->value();
161 }
162
163 return String();
164 }
165
contains(const String & name)166 bool DatasetDOMStringMap::contains(const String& name)
167 {
168 if (!m_element->hasAttributes())
169 return false;
170
171 unsigned length = m_element->attributeCount();
172 for (unsigned i = 0; i < length; i++) {
173 const Attribute* attribute = m_element->attributeItem(i);
174 if (propertyNameMatchesAttributeName(name, attribute->localName()))
175 return true;
176 }
177
178 return false;
179 }
180
setItem(const String & name,const String & value,ExceptionState & exceptionState)181 void DatasetDOMStringMap::setItem(const String& name, const String& value, ExceptionState& exceptionState)
182 {
183 if (!isValidPropertyName(name)) {
184 exceptionState.throwDOMException(SyntaxError, ExceptionMessages::failedToSet(name, "DOMStringMap", "'" + name + "' is not a valid property name."));
185 return;
186 }
187
188 m_element->setAttribute(convertPropertyNameToAttributeName(name), value, exceptionState);
189 }
190
deleteItem(const String & name,ExceptionState & exceptionState)191 void DatasetDOMStringMap::deleteItem(const String& name, ExceptionState& exceptionState)
192 {
193 if (!isValidPropertyName(name)) {
194 exceptionState.throwDOMException(SyntaxError, ExceptionMessages::failedToDelete(name, "DOMStringMap", "'" + name + "' is not a valid property name."));
195 return;
196 }
197
198 m_element->removeAttribute(convertPropertyNameToAttributeName(name));
199 }
200
201 } // namespace WebCore
202